{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:18.740000", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2026-Feb-23_to_2026-Feb-25_303.5_-16.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2026020000583}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "February 23 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 25 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 242914.50855963022}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Bolivia, Plurinational State of", "Brazil"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -16.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 303.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 299.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 307.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-60.75, -16.5], [-60.53, -15.97], [-60.18, -15.82], [-60.15, -15.75], [-60.25, -15.5], [-60.03, -14.97], [-59.5, -14.75], [-59.25, -14.85], [-59.0, -14.75], [-58.75, -14.85], [-58.5, -14.75], [-58.25, -14.85], [-58.18, -14.82], [-58.03, -14.47], [-57.5, -14.25], [-57.25, -14.35], [-57.0, -14.25], [-56.5, -14.46], [-56.0, -14.25], [-55.75, -14.35], [-55.68, -14.32], [-55.53, -13.97], [-55.0, -13.75], [-54.47, -13.97], [-54.32, -14.32], [-53.97, -14.47], [-53.82, -14.82], [-53.47, -14.97], [-53.25, -15.5], [-53.35, -15.75], [-53.32, -15.82], [-52.97, -15.97], [-52.75, -16.5], [-52.85, -16.75], [-52.75, -17.0], [-52.85, -17.25], [-52.82, -17.32], [-52.47, -17.47], [-52.25, -18.0], [-52.47, -18.53], [-53.0, -18.75], [-53.25, -18.65], [-53.5, -18.75], [-53.75, -18.65], [-54.0, -18.75], [-54.25, -18.65], [-54.5, -18.75], [-55.0, -18.54], [-55.5, -18.75], [-55.75, -18.65], [-56.0, -18.75], [-56.25, -18.65], [-56.5, -18.75], [-56.75, -18.65], [-57.0, -18.75], [-57.25, -18.65], [-57.5, -18.75], [-58.03, -18.53], [-58.18, -18.18], [-58.25, -18.15], [-58.5, -18.25], [-58.75, -18.15], [-59.0, -18.25], [-59.25, -18.15], [-59.5, -18.25], [-59.75, -18.15], [-60.0, -18.25], [-60.53, -18.03], [-60.75, -17.5], [-60.65, -17.25], [-60.75, -17.0], [-60.65, -16.75], [-60.75, -16.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["South-American-Monsoon"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.75, -17.0], [-60.64999999999998, -16.75], [-60.75, -16.5], [-60.52999999999997, -15.97], [-60.18000000000001, -15.82], [-60.14999999999998, -15.75], [-60.25, -15.5], [-60.02999999999997, -14.97], [-59.5, -14.75], [-59.25, -14.85], [-59.0, -14.75], [-58.75, -14.85], [-58.5, -14.75], [-58.25, -14.85], [-58.18000000000001, -14.82], [-58.02999999999997, -14.47], [-57.5, -14.25], [-57.25, -14.35], [-57.0, -14.25], [-56.5, -14.46], [-56.0, -14.25], [-55.75, -14.35], 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[-59.75, -18.15], [-60.0, -18.25], [-60.52999999999997, -18.03], [-60.75, -17.5], [-60.64999999999998, -17.25], [-60.75, -17.0]]]]}, "2026-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.75, -17.0], [-60.64999999999998, -16.75], [-60.75, -16.5], [-60.52999999999997, -15.97], [-60.18000000000001, -15.82], [-60.14999999999998, -15.75], [-60.25, -15.5], [-60.02999999999997, -14.97], [-59.5, -14.75], [-59.25, -14.85], [-59.0, -14.75], [-58.75, -14.85], [-58.5, -14.75], [-58.25, -14.85], [-58.18000000000001, -14.82], [-58.02999999999997, -14.47], [-57.5, -14.25], [-57.25, -14.35], [-57.0, -14.25], [-56.5, -14.46], [-56.0, -14.25], [-55.75, -14.35], [-55.68000000000001, -14.32], [-55.52999999999997, -13.97], [-55.0, -13.75], [-54.47000000000003, -13.97], [-54.31999999999999, -14.32], [-53.97000000000003, -14.47], [-53.81999999999999, -14.82], [-53.47000000000003, -14.97], [-53.25, -15.5], [-53.35000000000002, -15.75], [-53.31999999999999, -15.82], 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maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.114931996663415, 21.82353235880538, 22.05278676350912]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8757696431894728, -2.1324952264100663, -2.2216301490743926]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.629103328940971, -3.2033618104517814, -2.9594999225510605]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5328238604406876, -1.742495231441895, -1.8912470871286275]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1776270571476055, -2.3362902485419403, -2.4656452690099333]}}